What is IPC memory?

Inter Process Communication through shared memory is a concept where two or more process can access the common memory. And communication is done via this shared memory where changes made by one process can be viewed by another process.

Is IPC shared memory?

Shared memory is a memory shared between two or more processes. Each process has its own address space; if any process wants to communicate with some information from its own address space to other processes, then it is only possible with IPC (inter-process communication) techniques.

Which IPC is faster and why?

The IPC shared semaphore facility provides process synchronization. Shared memory is the fastest form of interprocess communication. The main advantage of shared memory is that the copying of message data is eliminated.

What is IPC in operating system?

In computer science, inter-process communication or interprocess communication (IPC) refers specifically to the mechanisms an operating system provides to allow the processes to manage shared data.

What is semaphore in IPC?

Semaphore is used to protect any resources such as Global shared memory that needs to be accessed and updated by many processes simultaneously. Semaphore acts as a guard / lock on the resources: Whenever a process needs to access the resource, it first needs to take permission from the semaphore.

Which one is the shared memory technique used in IPC?

Usually, inter-related process communication is performed using Pipes or Named Pipes. Unrelated processes (say one process running in one terminal and another process in another terminal) communication can be performed using Named Pipes or through popular IPC techniques of Shared Memory and Message Queues.

What are the advantages of IPC?

Advantages

  • Inter-process communication permits one application to manage another application, thus enabling data sharing devoid of interference.
  • This communication allows data communication through different processes to utilize semaphores, segments & other techniques to share data & memory.

Why shared memory is faster than message queue?

Kernel allows us to read entire message or read nothing for message queues. But shared memory requires part of segment is shared between 2 processes, both can do some synchronization technique and share the data between processes. Since there is no need to copy data to share to other process, shared memory is faster.

What are 3 IPC techniques?

These are the methods in IPC:

  • Pipes (Same Process) – This allows flow of data in one direction only.
  • Names Pipes (Different Processes) – This is a pipe with a specific name it can be used in processes that don’t have a shared common process origin.
  • Message Queuing –
  • Semaphores –
  • Shared memory –
  • Sockets –